1. Water conservation and residential landscapes: Household preferences, household choices;Hurd;J. Agric. Resour. Econ.,2006
2. Oklahoma Faces Major Water Challenge, OSU Oklahoma Water Resources Center Officials Say
https://oklahoman.com/article/5485881/oklahoma-faces-major-water-challenge-osu-oklahoma-water-resources-center-officials-say.2016
3. Water Use in Oklahoma 1950–2005;Tortorelli,2009
4. Oklahoma Agricultural Losses from Drought More Than $1.6 Billion;Stotts
5. Drought Losses in OK top $400 Million for 2012
http://water.okstate.edu/news-events/news/acs/drought-losses-in-ok-top-400-million-for-2012